Kevin Drum, Mother JonesWhy has the shameful witch hunt against Susan Rice continued to gain traction even though there is literally not a shred of evidence that she did anything wrong? I'd say this Pew poll tells us all we need to know. The only segment of the country that really cares about the sham Benghazi scandal is Republicans, and the reason Republicans are riled up about it is because of Fox News. How far down the rabbit hole have they gone with their 24/7 hysteria? A friend who follows their coverage closely emailed a few days ago to tell me what it's like these days: "Listening to Fox on…